From 894116bd0e9b7749a0c4b6c62dec13c2a0ccef68 Mon Sep 17 00:00:00 2001
From: Aida Mynzhasova <aida.mynzhasova@skitlab.ru>
Date: Wed, 25 Sep 2013 11:24:23 +0400
Subject: [PATCH] powerpc/83xx: gianfar_ptp: select 1588 clock source through
 dts file

Currently IEEE 1588 timer reference clock source is determined through
hard-coded value in gianfar_ptp driver. This patch allows to select ptp
clock source by means of device tree file node.

For instance:

	fsl,cksel = <0>;

for using external (TSEC_TMR_CLK input) high precision timer
reference clock.

Other acceptable values:

	<1> : eTSEC system clock
	<2> : eTSEC1 transmit clock
	<3> : RTC clock input

When this attribute isn't used, eTSEC system clock will serve as
IEEE 1588 timer reference clock.

Signed-off-by: Aida Mynzhasova <aida.mynzhasova@skitlab.ru>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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